Conventional and EVF can be one in the same unless a conventional swimming stroke means purposely dropping your elbow. The pulling pattern should never be straight back because the longer and the harder the hand moves backward the greater reduction in drag force (negative drag coefficient). The hand must move (scull slightly) into less turbulent water so peak drag force or pulling power can be maintained. As strong swimmers begin to improve their EVF, sprinters will begin to evolve into more right angled looking strokes like Rebecca Addlington's and less like Alain Bernard's. With everything being equal, a stroke like Bernards, in my opinion, can become faster by getting his forearm/hand vertical earlier. With that being said, Bernard may have anatomical factors (weak shoulder cuff, flexibility issues, EVF strength conversion habit issues) that could prevent that EVF alteration (his coach knows best). My contention is that any swimmer who can, without compromising anatomical health, improve the length of time they can keep their hand/forearm in the vertical position and improve how early they can get their hand / forearm in a vertical position, will drop time. I think conventional (as long as it doesn’t mean purposely dropping your elbow) and EVF are the same and physical limitations and training habits create the variances from swimmer to swimmer. The fastest swimmers in the world may have different looking strokes but the winners keep their hands/forearm in the vertical position earlier and in a vertical position that produces the most power the longest. Getting your hand / forearm in a power position early and keeping it their longer, isn’t all about pulling strength, it’s more importantly about the ability to resist dropping one’s elbow. I started doing an exercise where swimmers kick 50 yards with fins, holding their arms in front of them (breathe to the side or in the front), holding an EVF position. Try it and it will show you the ability to “set-up” your stroke early (conventional or not) is more difficult than you can imagine. The pressure of simply swimming forward requires strong shoulder-cuff stabilizing muscles ( supraspinatus, infraspinatus, teres minor, and subscapularis) and the above exercise will show you how weak or strong yours are. I think it’s safe to say, more often than not, swimmers don’t have the necessary shoulder cuff strength that allows them to properly “set-up” their stroke. And, let’s think about it, if you can’t keep your arm in a “set-up” position (conventional or not) for 50 yards, what are the chances of ever developing a better “set-up position until you strengthen and train to improve the muscles responsible for that position. I think isometrics and the use of surgical tubing offers the most effective way to improve shoulder-cuff strength. Email me at tomtomp@netzero.com if you’re interested in more information. Good luck, Coach T.
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Got timed out on the reply and unable to recover it so here goes a briefer one: I really enjoy all the different responses and yes I read his first book and many others a long time ago.
Anyway, regarding 3rd class levers, I belive the problem today is the way they are illustrated with the fulcrum incorrectly placed in the same position as a 2nd class lever. This is an error that has been repeated over and over for the past 50+ years, and caused so many erroneous opinions. Using a broom should demonstrate that the fulcrum should be placed on the opposing or opposite side of the lever or it will not work. A canoe paddle can be used as all three (3) levers, but only when used as a 2nd class lever will propel the canoe forward. As a 1st class lever, the fulcrum becomes the lower arm, and the load (water) travels in the opposite direction of the force (top hand). As a 3rd class lever, the fulcrum becomes the top hand, and the load (water) travels in the same direction of the force (bottom hand). Levers in anatomy are internal and should be kept separate from the action that's external.
Whether drag, lift, vortex shedding or axial flow, they all involve the action of forces that act in pairs. The trick is making a better marriage of them with EVF. clyde
Got timed out on the reply and unable to recover it so here goes a briefer one: I really enjoy all the different responses and yes I read his first book and many others a long time ago.
Anyway, regarding 3rd class levers, I belive the problem today is the way they are illustrated with the fulcrum incorrectly placed in the same position as a 2nd class lever. This is an error that has been repeated over and over for the past 50+ years, and caused so many erroneous opinions. Using a broom should demonstrate that the fulcrum should be placed on the opposing or opposite side of the lever or it will not work. A canoe paddle can be used as all three (3) levers, but only when used as a 2nd class lever will propel the canoe forward. As a 1st class lever, the fulcrum becomes the lower arm, and the load (water) travels in the opposite direction of the force (top hand). As a 3rd class lever, the fulcrum becomes the top hand, and the load (water) travels in the same direction of the force (bottom hand). Levers in anatomy are internal and should be kept separate from the action that's external.
Whether drag, lift, vortex shedding or axial flow, they all involve the action of forces that act in pairs. The trick is making a better marriage of them with EVF. clyde